IPSW Downloads

iPadOS 17.1.1 - 21B91 for iPad Air 4th Gen (WiFi)

This firmware is not signed. This means you cannot restore to it in iTunes.

Release Date08 November 2023
Upload Date03 November 2023
File NameiPad_Fall_2020_17.1.1_21B91_Restore.ipsw
File Size6.85 GB
SHA256sum366e8fc562c5ffae67087ea42edab9e42b4f6e5c14a6427edc3cf7c5215c5746
MD5sum3fe2fa4d5103a4d5ec83a4f9363fec00
SHA1sumc05fad816fc0456db194ed41b48ca7dddd0d704e
IdentifieriPad13,1

Installation Instructions

Windows

  1. Install the latest version of iTunes from the Microsoft Store.
  2. Connect your iPad Air 4th Gen (WiFi) to your PC.
  3. Open iTunes and navigate to your iPad Air 4th Gen (WiFi).
  4. Hold the Shift key and click "Restore".
  5. Select the iPad_Fall_2020_17.1.1_21B91_Restore.ipsw file you downloaded.
  6. Wait for the restore to complete and for your iPad Air 4th Gen (WiFi) to reboot.

macOS

  1. Connect your iPad Air 4th Gen (WiFi) to your Mac.
  2. Navigate to your iPad Air 4th Gen (WiFi) in Finder.
  3. Hold the Option or Alt key and click "Restore".
  4. Select the iPad_Fall_2020_17.1.1_21B91_Restore.ipsw file you downloaded.
  5. Wait for the restore to complete and for your iPad Air 4th Gen (WiFi) to reboot.

Linux

  1. Install idevicerestore.
  2. Connect your iPad Air 4th Gen (WiFi) to your PC.
  3. Open a terminal and navigate to the IPSW file you downloaded, e.g., cd ~/Downloads.
  4. To perform a full erase restore, type idevicerestore -e iPad_Fall_2020_17.1.1_21B91_Restore.ipsw and press Enter.
  5. Wait for the restore to complete and for your iPad Air 4th Gen (WiFi) to reboot.